Answers

Subtract 30/9 from 81/72

1^st number: 1 9/72, 2^nd number: 3 3/9

81/72 - 30/9 is -53/24.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 9 is 72
   
   Next, find the equivalent fraction of both fractional numbers with denominator 72
2. For the 1st fraction, since 72 × 1 = 72,
   81/72 = 81 × 1/72 × 1 = 81/72
3. Likewise, for the 2nd fraction, since 9 × 8 = 72,
   30/9 = 30 × 8/9 × 8 = 240/72
4. Subtract the two like fractions:
   81/72 - 240/72 = 81 - 240/72 = -159/72
5. After reducing the fraction, the answer is -53/24

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